4 females: L = 0.31-0.40 mm; a = 31-37; b =
5.5-6.0; c = 5-6; V = 66-70; spear = 5-6um.
Female (holotype): L = 0.37 mm; a = 34; b =
5.8; c = 6; V = 68; spear = 6um.
Body cylindrical, ventrally arcuate when relaxed by gentle heat, tapering
towards both extemities. Curicle finely striated. Lateral field
marked by four incisures. Lip region continuous with the body contour,
faintly annulated. Spear short with rounded knobs. Orifice
of the dorsal oesophageal gland at about 1.5um from the spear base.
Oesophagus typical for the genus.
Isthmus slender, with nerve ring at about 43um and excretory pore
at about 52um form the anterior end. The distance from the
anterior end to the end of the median bulb is equal to the distance from
the latter to the base of oesophagus. Hemizonid distinct, just anterior
to the excretory pore. Cardia hemispherical. Vulva a transverse
slit, vagina leading 1/3 into the body. Ovary single, prodelphic,
outstretched. Post-uterine sac absent. Vulva-anus distance
less than the tail length. Tail long and filiform with acute terminus,
measuring about twice the vulva-anus distance.
Male: not found.
Type habitat and locality: Collected from soil around
roots of Solanum tuberosum L. from Ranikhet, U.P., India.
Diagnosis and relationships: Lelenchus magnus sp.
n. comes close to L. discrepans (Andrassy, 1954) Meyl, 1960, L.
aberrans (Altherr, 1952) Andrassy, 1954, L. infirmus (Andrassy,
1954) Meyl, 1960 and L. minutus (Cobb, 1893) Andrassy, 1954.
It however differs from L. discrepans in possessing longer spear,
absence of post-uterine sac, continuous lip region, and posteriorly located
vulva (V = 61-2-62.4 in discrepans); from L. aberrans
in having larger b-value (b = 3.5-4.8 in aberrans), longer
spear, posteriorly located vulva and the absence of post-uterine sac; from
L. infirmus in the presence of spear knobs, absence of post-uterine
sac, larger c-value and posteriorly located vulva (c = 3.5 and V
= 58 in infirmus) and from L. minutus in possessing smaller
spear, larger b-value, posteriorly located vulva (b = 4.2 and V
= 65-67 in minutus) and absence of post-uterine sac.
(Description- Husain and Khan, 1975)
